Ink cartridge



FIG. 1 is a front, top and left-side perspective view of an ink cartridge:

FIG. 2 is a front view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a right-side view thereof;

FIG. 5 is a left-side view thereof;

FIG. 6 is a rear view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a rear, bottom and right-side perspective view thereof.

The broken lines depict environmental subject matter only and form no part of the claimed design. 

The ornamental design for an ink cartridge, as shown and described. 